If you've set up a magazine (not an issue) that you'd like to delete here are the steps to follow:
If a magazine doesn't have any issues, articles and pages in it...
- From "Magazine Center" select the magazine you want to delete and click "Finish Setup" or "Edit Settings"
- Then hover over the purple button "Actions" in top right corner and there will be an option to delete it.
If your magazine has some issues, articles and/or pages, those need to be deleted first in order to delete a magazine.